a face
It is a type of foamy mace used mainly on bears.
A mace was used in medieval times by knights and guards, it is a very powerful spiked club.
at a ceremony
It was used in c.3050BC
Sergeant of arms keeps the peace in a meeting. A mace is used to hit people so if needed he would hit people. A mace was mainly used in war and not to keep the peace.
The spice mace is the 'aril' or extra covering around the nut known as nutmeg, which is itself used as a spice and has a different taste from that of mace.
They could be used in battle.
England
Leather strips are bridles which are used to control the horse, but mace, I have no idea.
At all Royal ceremonies.
The mace in the House of Commons is a symbol of the authority of Parliament and is used during formal sessions. It is placed on the central table when the House is in session, signifying that the House is properly constituted to conduct business. If the mace is absent, it indicates that the House cannot meet or legislate. Additionally, the mace is removed when the House is in recess or when it is not in session.
mace